<template>
	<div>
		<!-- 顶部滑动条区域 -->
		<div id="slider" class="mui-slider">
			<div id="sliderSegmentedControl" class="mui-scroll-wrapper mui-slider-indicator mui-segmented-control mui-segmented-control-inverted">
				<div class="mui-scroll">
					<a :class="['mui-control-item', item.id == 0 ? 'mui-active' : '']" v-for="item in cates" @tap="getPhotoListByCateId(item.id)">
						{{ item.title }}
					</a>
				</div>
			</div>

		</div>

		<!-- 图片列表区域 -->
		<ul class="photo-list">
			<router-link v-for="item in list" :to="'/home/photoinfo/' + item.id" tag="li">
				<img v-lazy="item.img_url">
				<div class="info">
					<h1 class="info-title">{{ item.title }}</h1>
					<div class="info-body">{{ item.zhaiyao }}</div>
				</div>
			</router-link>
		</ul>

	</div>
</template>

<script>
	// 1. 导入 mui 的js文件
	import mui from "../../lib/mui/js/mui.min.js";
	export default {
		data() {
			return {
				cates: [], 
				list: []
			};
		},
		created() {
			this.getAllCategory();
			// 默认进入页面，就主动请求 所有图片列表的数据
			this.getPhotoListByCateId(0);
		},
		mounted() {
			mui(".mui-scroll-wrapper").scroll({
				deceleration: 0.0005 //flick 减速系数，系数越大，滚动速度越慢，滚动距离越小，默认值0.0006
			});
		},
		methods: {
			getAllCategory() {
				this.$http.get("api/getimgcategory").then(res => {
						res.body.message.unshift({
							title: "全部",
							id: 0
						});
						this.cates = res.body.message;
				});
			},
			getPhotoListByCateId(cateId) {
				// 根据 分类Id，获取图片列表
				this.$http.get("api/getimages/" + cateId).then(res => {
					    //console.log(res.body.message)
						this.list = res.body.message;
				});
			}
		}
	};
</script>

<style lang="scss" scoped>
	* {
		touch-action: pan-y;
	}

	.photo-list {
		list-style: none;
		margin: 0;
		padding: 10px;
		padding-bottom: 0;

		li {
			background-color: #ccc;
			text-align: center;
			margin-bottom: 10px;
			box-shadow: 0 0 9px #999;
			position: relative;

			img {
				width: 100%;
				vertical-align: middle;
			}

			img[lazy="loading"] {
				width: 40px;
				height: 300px;
				margin: auto;
			}

			.info {
				color: white;
				text-align: left;
				position: absolute;
				bottom: 0;
				background-color: rgba(0, 0, 0, 0.4);
				max-height: 84px;

				.info-title {
					font-size: 14px;
				}

				.info-body {
					font-size: 13px;
				}
			}
		}
	}
	.mui-segmented-control .mui-control-item{
		font-size: 17px;
	} 
</style>
